Answer :

Mean weight of 60 students = 52.75 kg

Sum of weight of 60 students = 60×52.75 = 3165 kg

Mean weight of 25 students of them = 51kg

Sum of weight of 25 students = 51×25 = 1275 kg

Sum of weight of remaining 35 students = Sum of weight of 60 students - Sum of weight of 25 students

= 3165 – 1275 = 1890 kg

Mean of remaining 35 students =

Hence mean of remaining students is 54kg.

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